WHEELED CRANE AND SELF-DEMOUNTING AND SELF-MOUNTING METHODS FOR SUPPORTING LEGS THEREOF

Abstract

A wheeled crane and self-demounting and self-mounting methods for supporting legs thereof is disclosed. The wheeled crane includes a vehicle frame and auxiliary supports, and the auxiliary supports can enable the vehicle frame to keep balance. Since the wheeled crane has auxiliary supports, when the supporting legs are demounted or mounted, the auxiliary supports function as supporting legs, so that the supporting legs can be mounted and demounted by the operation part of the wheeled crane with no need of using an auxiliary crane, and thus the self-mounting and self-demounting of the supporting legs of the wheeled crane are realized.

Claims

1-18. (canceled)

19. A wheeled crane, comprising: a vehicle frame and one or more auxiliary supports, wherein the one or more auxiliary supports are configured to enable the vehicle frame to keep balance.

20. The wheeled crane of claim 19, wherein the one or more auxiliary supports comprise a plurality of auxiliary supports, and the plurality of auxiliary supports support the vehicle frame together to enable the vehicle frame to keep balance.

21. The wheeled crane of claim 19, wherein the one or more auxiliary supports are supporting legs in a connected configuration on the wheeled crane, and the supporting legs are configured to change positions and/or angles relative to the vehicle frame to enable the vehicle frame to keep balance.

22. The wheeled crane of claim 19, further comprising supporting legs, wherein the auxiliary supports and the supporting legs support the vehicle frame together to enable the vehicle frame to keep balance.

23. The wheeled crane of claim 22, wherein the supporting legs are detachably connected with the vehicle frame, the auxiliary supports are connected to the vehicle frame, and the auxiliary supports are near the supporting legs; and the supporting legs are selected from to-be-mounted supporting legs and to-be-demounted supporting legs on the wheeled crane.

24. The wheeled crane of claim 20, wherein the auxiliary supports are fixedly connected with the vehicle frame or the auxiliary supports are movable.

25. The wheeled crane of claim 23, wherein the pipelines between the supporting legs and the vehicle frame are connected by a fast insertion structure.

26. The wheeled crane of claim 23, wherein the auxiliary supports are tires.

27. The wheeled crane of claim 19, wherein the one or more auxiliary supports comprise at least two auxiliary supports, the auxiliary supports and non-demounted supporting legs together provide four trapezoidal supporting points, or there are at least four auxiliary supports, the auxiliary supports together provide four trapezoidal or rectangular supporting points; a distance between the auxiliary supports and the vehicle frame is more than a half of a width of the vehicle frame.

28. A self-demounting method for supporting legs of a wheeled crane, comprising the following steps: employing auxiliary supports to enable the vehicle frame of the wheeled crane to keep balance; employing an operation part of the wheeled crane to lift the supporting leg before demounting, and demounting a connecting piece between the supporting leg and the vehicle frame of the wheeled crane; and lifting the demounted supporting leg onto a transport tool.

29. The self-demounting method for the supporting legs of the wheeled crane of claim 28, wherein the step of employing the auxiliary supports to enable the vehicle frame of the wheeled crane to keep balance comprises at least one of the following: singly employing the auxiliary supports to enable the vehicle frame to keep balance; employing the auxiliary supports and non-demounted supporting legs on the wheeled crane to enable the vehicle frame to keep balance together; and wherein the auxiliary supports are the non-demounted supporting legs on the wheeled crane, and changing the positions and/or angles of the supporting legs relative to the vehicle frame to enable the vehicle frame to keep balance.

30. The self-demounting method for the supporting legs of the wheeled crane of claim 28, wherein the step of demounting a connecting piece between the supporting leg and the vehicle frame of the wheeled crane comprises: demounting the connecting piece between the supporting leg and the vehicle frame of the wheeled crane in a mechanical manner, a hydraulic manner, a pneumatic manner or an electrical manner.

31. The self-demounting method for the supporting legs of the wheeled crane of claim 28, wherein after the lifting the demounted supporting leg onto a transport tool, the method further comprises: detecting whether the wheeled crane with the demounted supporting leg can keep balance, and if the demounted supporting leg does not keep balance, at least employing one of the following manners to enable the vehicle frame to keep balance: adjusting the positions and/or states of the auxiliary supports, or adjusting the positions and/or angles of the non-demounted supporting legs; and rotating the operation part of the wheeled crane for a certain angle, and demounting the next supporting leg until all the supporting legs are demounted.

32. A self-mounting method for the supporting legs of the wheeled crane, comprising the following steps: employing the auxiliary supports to enable the vehicle frame of the wheeled crane to keep balance; and employing the operation part of the wheeled crane to lift the to-be-mounted supporting leg, and mounting the supporting leg on the vehicle frame.

33. The self-mounting method for the supporting legs of the wheeled crane of claim 32, wherein the employing the auxiliary supports to enable the vehicle frame of the wheeled crane to keep balance comprises one of the following manners: singly employing the auxiliary supports to enable the vehicle frame to keep balance; employing the auxiliary supports and non-demounted supporting legs on the wheeled crane to enable the vehicle frame to keep balance together; and the auxiliary supports are the non-demounted supporting legs on the wheeled crane, and changing the positions and/or angles of the supporting legs relative to the vehicle frame to enable the vehicle frame to keep balance.

34. The self-mounting method for the supporting legs of the wheeled crane of claim 32, wherein the step of employing the operation part of the wheeled crane to lift the to-be-mounted supporting leg, and mounting the supporting leg on the vehicle frame comprises: lifting the supporting leg to a necessary height; aligning a pin shaft hole in the supporting leg with the pin shaft hole in the vehicle frame; inserting a pin shaft in a mechanical manner, a hydraulic manner, a pneumatic manner or an electrical manner; and connecting the pipelines between the supporting leg and the vehicle frame.

35. The self-mounting method for the supporting legs of the wheeled crane of claim 34, wherein the step of connecting the pipelines between the supporting leg and the vehicle frame comprises: connecting the pipelines between the supporting leg and the vehicle frame by employing a fast insertion structure.

36. The self-mounting method for the supporting legs of the wheeled crane of claim 33, wherein after the employing the operation part of the wheeled crane to lift the to-be-mounted supporting leg, and mounting the supporting leg on the vehicle frame, the method further comprises: detecting whether the wheeled crane with the mounted supporting leg can keep balance, and if the wheeled crane with the mounted supporting leg cannot keep balance, at least employing one of the following manners to enable the vehicle frame to keep balance: adjusting the positions and/or states of the auxiliary supports, or adjusting the positions and/or angles of the supporting legs connected with the vehicle frame; and rotating the operation part of the wheeled crane for a certain angle, and mounting the next supporting leg until all the supporting legs are mounted.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0075] FIG. 1 is a schematic diagram of a lifting operation state of a wheeled crane in the prior art;

[0076] FIG. 2a is a structural schematic diagram of H-shaped supporting legs on the wheeled crane in the prior art;

[0077] FIG. 2b is a structural schematic diagram of K-shaped supporting legs on the wheeled crane in the prior art;

[0078] FIG. 2c is a structural schematic diagram of X-shaped supporting legs on the wheeled crane in the prior art;

[0079] FIG. 3a is a schematic diagram of welding between fixed supporting legs and a vehicle frame of the wheeled crane in the prior art;

[0080] FIG. 3b is a schematic diagram of pin shaft connection between the fixed supporting legs and the vehicle frame of the wheeled crane in the prior art;

[0081] FIG. 4 is a schematic diagram of demounting and mounting of the supporting leg of the wheeled crane in the prior art;

[0082] FIG. 5 is a structural schematic diagram of a wheeled crane provided by embodiment 1 of the present invention;

[0083] FIG. 6 is a schematic diagram of demounting and mounting of the supporting legs of the wheeled crane provided by embodiment 1 of the present invention;

[0084] FIG. 7 is a schematic flow diagram of a self-demounting method for supporting legs of a wheeled crane provided by embodiment 4 of the present invention;

[0085] FIG. 8 is a schematic flow diagram of a self-mounting method for the supporting legs of the wheeled crane provided by embodiment 5 of the present invention.

REFERENCE SIGNS

[0086] 1. vehicle frame; 2. supporting leg; 3. auxiliary support;

[0087] 4. operation part; 5. non-demounted supporting leg; 11. supporting leg;

[0088] 12. operation part; 13. chassis; 14. weight;

[0089] 15. swing supporting leg; 16. telescopic supporting leg; 31 fixed supporting leg;

[0090] 32. vehicle frame; 33. pin shaft; 41. main crane; and

[0091] 42. auxiliary crane.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0092] The technical solutions provided by the present invention will be illustrated in more details in combination with FIG. 5 to FIG. 8, and technical solutions obtained by replacing any technical means provided by the present invention or combining two or more arbitrary technical means or technical features provided by the present invention shall all fall within the protection scope of the present invention.

[0093] Embodiments of the present invention provide a wheeled crane, which can keep balance consistently, so that supporting legs are demounted or mounted just by using an operation part of the wheeled crane, and self-support maintenance of the wheeled crane can also be realized, and multiple embodiments are given herein for illustration.

Embodiment 1

[0094] The first embodiment of the present invention provides a wheeled crane, including a vehicle frame 1 and auxiliary supports 3, wherein the auxiliary supports 3 can enable the vehicle frame 1 to keep balance.

[0095] In the embodiment, the auxiliary supports 3 and supporting legs 2 in a connected state with the vehicle frame 1 provide four or more supporting points together to enable the vehicle frame of the wheeled crane to keep balance. Due to the four or more supporting points, the wheeled crane can consistently keep a relatively stable state, and the arrangement positions of the auxiliary supports 3 are relatively easier. If three-point support is employed, the arrangement positions of the auxiliary supports 3 need to be accurately selected.

[0096] Taking it as an example that the wheeled crane has four supporting legs, when two supporting legs need to be demounted, for example, one front supporting leg and one back supporting leg or two supporting legs on the front or two supporting legs on the back are respectively demounted, and the number of the auxiliary supports 3 is preferably not less than the number of the to-be-demounted supporting legs.

[0097] Detailed introduction will be given below in combination with FIG. 5 and FIG. 6. The wheeled crane provided by embodiment 1 of the present invention includes the vehicle frame 1, the supporting legs 2 and the auxiliary supports 3. The supporting legs 2 are detachably connected with the vehicle frame 1, the auxiliary supports 3 are connected with the vehicle frame 1, and the auxiliary supports 3 are in the vicinity of the supporting legs 2. The supporting legs 2 are selected from to-be-mounted supporting legs and to-be-demounted supporting legs on the wheeled crane. That is, the auxiliary supports 3 are in the vicinity of the to-be-mounted supporting legs or the to-be-demounted supporting legs.

[0098] The supporting legs are supporting mechanisms during the operations of the wheeled crane for supporting the crane or weights. According to whether front and back supporting legs need to extend and retract (or swing), the supporting legs are divided into movable supporting legs and fixed supporting legs. The supporting legs 2 in the embodiment specifically refer to movable supporting legs and those supporting legs needing to be demounted or mounted in the fixed supporting legs connected with the main body of the vehicle frame 1 by pin shafts, that is, the to-be-mounted supporting legs and the to-be-demounted supporting legs. For example, for a wheeled crane having four movable supporting legs, the number of the to-be-demounted supporting legs is not limited during transport. The supporting legs 2 in the embodiment specifically refer to the to-be-demounted supporting legs during a demounting operation and specifically refer to the to-be-mounted supporting legs during a mounting operation.

[0099] In the embodiment, when the supporting legs of the crane are demounted/mounted, the auxiliary supports 3 temporarily replace the supporting legs to function as the supporting mechanisms. The auxiliary supports 3 can also employ structures similar to the supporting legs, or other structures with enough carrying capacity.

[0100] The auxiliary supports 3 play the same role as the supporting legs, so that when the to-be-demounted supporting legs in the vicinity of the auxiliary supports 3 are demounted, the stability of the crane is guaranteed; or when the to-be-mounted supporting legs are mounted, the auxiliary supports function as supporting the crane.

[0101] Since the wheeled crane provided by the aforementioned technical solution has the auxiliary supports 3, when the to-be-demounted supporting legs are demounted or the to-be-mounted supporting legs are mounted, the auxiliary supports 3 can function as the supporting legs, so that the supporting legs can be mounted or demounted by the operation part 4 of the wheeled crane with no need of using an auxiliary crane, and thus the self-mounting and self-demounting of the supporting legs of the wheeled crane are realized. It can be understood that when the wheeled crane requires maintenance, even if the supporting legs are out of order and cannot stretch out, the auxiliary supports 3 can also be lifted up to improve the maintenance convenience.

[0102] There is at least one auxiliary support 3. The auxiliary supports 3 are arranged in the vicinity of the to-be-demounted supporting legs. Of course, the auxiliary supports 3 can also be arranged at other positions where the vehicle frame 1 can keep balance.

[0103] When the number and the distribution positions of the auxiliary supports 3 are determined, the stability of the lifting operation of the whole crane needs to be fully considered. According to different demounting and mounting forms of the supporting legs, the following three conditions can be contained:

[0104] First, when two swing supporting legs of K-shaped supporting legs or two front (or two back) swing supporting legs of X-shaped supporting legs are demounted and mounted, the auxiliary supports 3 are placed at positions in the vicinity of supporting leg disks or other reasonable positions when the to-be-demounted supporting legs retract, and 2 or other numbers of auxiliary supports 3 are used in general.

[0105] Second, when back fixed supporting legs of the K-shaped supporting legs or connected with H-shaped pin shafts are demounted and mounted, the auxiliary supports 3 are placed at positions in the vicinity of fixed supporting legs or other reasonable positions on the main body of the vehicle frame 1, and 2 or other numbers of auxiliary supports 3 are used in general.

[0106] The auxiliary supports 3 and the vehicle frame 1 can be fixedly connected or detachably connected.

[0107] Specifically, the auxiliary supports 3 fixed with the vehicle frame 1 can be fixed on proper positions on the vehicle frame 1 or other components fixed with the vehicle frame 1. The auxiliary supports 3 detachably connected with the vehicle frame 1 can be separated from the vehicle frame 1 and meanwhile can be quickly connected with the vehicle frame 1. No matter the auxiliary supports 3 in which aforementioned forms are adopted, hydraulic supports or mechanical supports or the like can be employed.

[0108] To improve the demounting and mounting efficiency of the supporting legs 2, the pipelines between the supporting legs 2 and the vehicle frame 1 are connected by a fast insertion structure, in order to quickly and conveniently demount and mount the pipelines.

[0109] As mentioned above, the auxiliary supports 3 can employ a variety of structures, and the auxiliary supports 3 can be special tires as an example.

[0110] The tires herein can be walking tires of the wheeled crane, for example, when the two front supporting legs are demounted, two front walking tires and two back non-demounted supporting legs form four-point support together to realize the self-mounting of the front supporting legs, for example, when two back supporting legs are demounted, two back walking tires and two front non-demounted supporting legs form four-point support together to realize the self-demounting of the back supporting legs.

Embodiment 2

[0111] In the embodiment, the auxiliary supports 3 are singly employed to enable the wheeled crane to consistently keep balance, and the auxiliary supports 3 have a variety of implementation forms, for example, tires, supporting leg structures similar to the supporting legs or the like. If all the auxiliary supports 3 are used, the necessary space is small. Moreover, since the auxiliary supports 3 can stably support the wheeled crane, when the wheeled crane is out of order, the auxiliary supports 3 can be directly used for supporting the wheeled crane to maintain the wheeled crane, and thus it can be avoided that the wheeled crane is supported by other auxiliary equipment.

[0112] There are preferably four or more auxiliary supports 3, so that the wheeled crane is always in a four or more-point supporting state.

[0113] The auxiliary supports 3 can be movable and can be provided with a plurality of mounting positions. When the auxiliary supports 3 need to be used, the auxiliary supports 3 are mounted on the necessary positions and are accommodated when not in use. When different supporting legs 2 are demounted and mounted, the positions of some or all of the auxiliary supports 3 can be adjusted to enable the vehicle frame 1 to always keep a relatively stable balance state so as to improve the safety.

[0114] Embodiment 1 and embodiment 2 are specifically illustrated below in view of forms of the supporting legs:

[0115] 1. H-shaped supporting leg

[0116] 1.1. Demounting and mounting of one movable supporting leg (one front supporting leg/one back supporting leg):

[0117] The number of the auxiliary supports: at least one.

[0118] The demounting and mounting method: when only one auxiliary support is employed, the auxiliary support supports with the remaining three non-demounted supporting legs together; and when two auxiliary supports are employed, the auxiliary supports can be combined with two (or three) non-demounted supporting legs.

[0119] When three auxiliary supports are employed, the auxiliary supports can be combined with one (or two or three) non-demounted supporting leg.

[0120] When four (or more than four) auxiliary supports are employed, all the auxiliary supports are used for supporting without being combined with the non-demounted supporting legs, and of course, the auxiliary supports can also be combined with the non-demounted supporting legs to support together.

[0121] 1.2. Demounting and mounting of two movable supporting legs (two front supporting legs/two back supporting legs/one front supporting leg and one back supporting leg):

[0122] The number of the auxiliary supports: at least two auxiliary supports are needed.

[0123] The demounting and mounting method: when two auxiliary supports are employed, the auxiliary supports form support with the remaining two non-demounted supporting legs.

[0124] When three auxiliary supports are employed, the auxiliary supports are combined with one non-demounted supporting leg.

[0125] When four (or more than four) auxiliary supports are employed, all the auxiliary supports are used for supporting without being combined with the non-demounted supporting legs, and of course, the auxiliary supports can also be combined with the non-demounted supporting legs to support together.

[0126] 1.3. Demounting and mounting of three movable supporting legs (two front supporting legs and one back supporting leg/two back supporting legs/one front supporting leg):

[0127] The number of the auxiliary supports: at least three auxiliary supports are needed.

[0128] When three auxiliary supports are employed, the auxiliary supports are combined with one non-demounted supporting leg to support together.

[0129] When four (or more than four) auxiliary supports are employed, all the auxiliary supports are used for supporting without being combined with the non-demounted supporting legs, and of course, the auxiliary supports can also be combined with the non-demounted supporting legs to support together.

[0130] 1.4. Demounting and mounting of four movable supporting legs:

[0131] The number of the auxiliary supports: at least four auxiliary supports are needed.

[0132] When four (or more than four) auxiliary supports are employed, all the auxiliary supports are used.

[0133] 1.5. Demounting and mounting of one fixed supporting leg (including two movable supporting legs therein): being the same as 1.2.

[0134] 1.6. Demounting and mounting of two fixed supporting legs (including four movable supporting legs therein): being the same as 1.4.

[0135] 2. K-shaped supporting leg

[0136] 2.1. Demounting and mounting of one movable supporting leg (one front supporting leg/one back supporting leg): being the same as 1.1.

[0137] 2.2. Demounting and mounting of two movable supporting legs (two front supporting legs/two back supporting legs/one front supporting leg and one back supporting leg): being the same as 1.2.

[0138] 2.3. Demounting and mounting of three movable supporting legs (two front supporting legs and one back supporting leg/two back supporting legs/one front supporting leg): being the same as 1.3.

[0139] 2.4. Demounting and mounting of four movable supporting legs: being the same as 1.4.

[0140] 2.5. Demounting and mounting of fixed supporting legs (including two movable supporting legs therein): being the same as 1.5.

[0141] 3. X-shaped supporting leg

[0142] 3.1. Demounting and mounting of one movable supporting leg (one front supporting leg/one back supporting leg): being the same as 1.1.

[0143] 3.2. Demounting and mounting of two movable supporting legs (two front supporting legs/two back supporting legs/one front supporting leg and one back supporting leg): being the same as 1.2.

[0144] 3.3. Demounting and mounting of three movable supporting legs (two front supporting legs and one back supporting leg/two back supporting legs/one front supporting leg): being the same as 1.3.

[0145] 3.4. Demounting and mounting of four movable supporting legs: being the same as 1.4.

Embodiment 3

[0146] In the embodiment, the vehicle frame of the wheeled crane consistently keeps balance in the following manner: the auxiliary supports 3 are the supporting legs 2 in the connected state on the wheeled crane, and the supporting legs 2 can change their own positions and/or angles relative to the vehicle frame 1 to enable the vehicle frame 1 to keep balance.

[0147] Preferably, the wheeled crane has five or more supporting legs, so that the wheeled crane is consistently located in a four or more-point supporting state.

[0148] When different supporting legs 2 are demounted, the stretching or swinging positions of the non-demounted supporting legs 2 are adjusted to improve safety.

[0149] It should be noted that: when a plurality of supporting legs (e.g., first supporting legs and second supporting legs) are demounted and mounted, when the first supporting legs are demounted, the second supporting legs can play a role of supporting, and one auxiliary support can be reduced to improve safety; and when the second supporting legs are mounted, the first supporting legs can play a role of supporting, and one auxiliary support can also be reduced to improve safety.

[0150] The placement positions of the auxiliary supports: in the vicinity of the to-be-mounted supporting leg or other positions where the supporting roles can be played.

Embodiment 4

[0151] The fourth embodiment of the present invention provides a self-demounting method for the supporting legs of the wheeled crane. Preferably, the method is implemented by the wheeled crane in any technical solution provided by the present invention. Referring to FIG. 6 and FIG. 7, the self-demounting method includes the following steps:

[0152] Step S11: the auxiliary supports and the non-demounted supporting legs are all opened to bear the weight of the whole crane, and at this time, the auxiliary supports function as the supporting legs.

[0153] It should be noted that the auxiliary supports can be employed to enable the vehicle frame of the wheeled crane to keep balance in a variety of manners, besides the manner in step S11, the following several manners can also be employed: the auxiliary supports are singly employed to enable the vehicle frame to keep balance; the auxiliary supports and the non-demounted supporting legs on the wheeled crane are employed together to enable the vehicle frame to keep balance, and this manner is taken as an example in the embodiment; and the auxiliary supports are the non-demounted supporting legs on the wheeled crane, and the positions and/or angles of the supporting legs relative to the vehicle frame are changed to enable the vehicle frame to keep balance.

[0154] If all the auxiliary supports are employed, the necessary space is small, and moreover, the wheeled crane can be maintained without using other lifting equipment. The manner of combining the auxiliary supports with the non-demounted supporting legs is good in stability and high in safety; and meanwhile, when different supporting legs are demounted, different combination forms can be employed, and thus the flexibility is good.

[0155] It should be noted that when different supporting legs are demounted, the positions of the auxiliary supports detachably connected with the vehicle frame can be adjusted to improve safety.

[0156] In addition, when different supporting legs are demounted, the stretching or swinging positions of the non-demounted supporting legs are adjustable, and the safety can also be improved in this way.

[0157] In the embodiment, it is taken as an example that the auxiliary supports and the non-demounted supporting legs on the wheeled crane are employed together to enable the vehicle frame to keep balance. As mentioned above, the auxiliary supports 3 can be fixedly connected or detachably connected with the vehicle frame 1, if the auxiliary supports 3 detachably connected with the vehicle frame 1 are employed herein, the auxiliary supports 3 need to be mounted on the vehicle frame 1 in advance, and then the auxiliary supports 3 are opened.

[0158] Prior to or after step S11, the connection oil pipes of the supporting legs 2 and other accessories can also be demounted.

[0159] Step S12: the to-be-demounted supporting leg is lifted by the operation part of the wheeled crane, and a connecting piece between the supporting leg and the vehicle frame of the wheeled crane is demounted; and [0160] the operation part 4 of the wheeled crane is operated to lift the supporting leg 2, and the connecting pin shaft between the supporting leg 2 and the vehicle frame 1 is pulled out in a mechanical manner or a hydraulic manner, so that there is no connecting part between the supporting leg 2 and the vehicle frame 1.

[0161] Step S13: the demounted supporting leg is lifted onto a transport tool.

[0162] In step S13, the demounted supporting leg is lifted in a normal operation mode and is placed on the transport tool, and then the demounting of one swing supporting leg (or a fixed supporting leg connected by the pin shaft) is completed.

[0163] When there is more than one supporting leg 2, after the demounted supporting leg 2 is lifted onto the transport tool, the method further includes:

[0164] Step S14: the operation part of the wheeled crane is rotated for a certain angle to demount the next supporting leg until all the supporting legs are demounted.

[0165] It should be noted that prior to step S14, if the stability of the wheeled crane cannot be guaranteed, the positions and open/closed states of the auxiliary supports can be adjusted; and the stretching or swinging positions and the open/closed states of the auxiliary supports can also be adjusted, in order to enable the vehicle frame to consistently keep balance. That is, prior to step S14, the method can further include the following steps: detecting whether the wheeled crane with the supporting leg demounted can keep balance, if not, at least employing one of the following manners to enable the vehicle frame to keep balance: adjusting the positions and/or states of the auxiliary supports, or adjusting the positions and/or angles of the non-demounted supporting legs.

[0166] After all the supporting legs 2 are demounted, the operation part 4 of the wheeled crane needs to reset, all the non-demounted supporting legs on the wheeled crane need to be recycled and the auxiliary supports 3 need to be recycled to enable the main crane to have a travelling state and drive to the operation site, and then the supporting legs 2 are mounted. For the auxiliary supports 3 detachably connected with the vehicle frame 1, the auxiliary supports 3 need to be accommodated at first, and then the auxiliary supports 3 are moved away.

[0167] According to the self-demounting method for the supporting legs of the wheeled crane provided by the aforementioned technical solutions, the auxiliary supports 3 are combined with the operation part 4 of the crane to realize the self-demounting of the supporting legs 2 of the crane, and the auxiliary mechanical equipment is also reduced, thereby reducing the dependency on other cranes, and reducing the operation cost; and the operation preparation and position transfer time of the auxiliary crane are reduced, and thus the operation efficiency is improved. In addition, the occupied volume of the auxiliary supports 3 is small, and thus the necessary operation space is small during the self-demounting of the supporting legs 2.

Embodiment 5

[0168] The fifth embodiment of the present invention provides a self-mounting method for the supporting legs of the wheeled crane. Preferably, the method is implemented by the wheeled crane in any technical solution provided by the present invention. The supporting legs 2 of the wheeled crane refer to to-be-mounted supporting legs. Referring to FIG. 6 and FIG. 8, the self-mounting method includes the following steps:

[0169] Step S21: the auxiliary supports in the vicinity of the supporting legs and the supporting legs still connected with the vehicle frame are all opened to bear the weight of the whole crane, and at this time, the auxiliary supports function as the supporting legs. If the auxiliary supports are detachably connected with the vehicle frame, the auxiliary supports need to be mounted and placed on predetermined positions, and then the auxiliary supports are opened.

[0170] It should be noted that the auxiliary supports are employed to enable the vehicle frame of the wheeled crane to keep balance in a variety of manners, besides the manner in step S21, the following several manners can also be employed: the auxiliary supports are singly employed to enable the vehicle frame to keep balance; or, the auxiliary supports are the non-demounted supporting legs on the wheeled crane, and the positions and/or angles of the supporting legs relative to the vehicle frame are changed to enable the vehicle frame to keep balance.

[0171] Step S22: the supporting leg is lifted by the operation part of the wheeled crane, and the supporting leg is mounted on the vehicle frame.

[0172] Specifically, step S22 can include: operating the operation part of the main crane, lifting the supporting leg from the transport equipment, lifting the supporting leg in a normal operation manner, selecting a proper lifting height and posture, and lifting the supporting leg to a necessary height; aligning a pin shaft hole in the supporting leg with the pin shaft hole in the vehicle frame; inserting a pin shaft in a mechanical manner or a hydraulic manner; and connecting the pipelines between the supporting leg and the vehicle frame. So far, the self-mounting of one supporting leg 2 is completed.

[0173] The connecting the pipelines between the supporting leg 2 and the vehicle frame 1 is specifically as follows: connecting the pipelines between the supporting leg 2 and the vehicle frame 1 by a fast insertion structure. The mounting efficiency of the pipelines can be improved by employing the fast insertion structure.

[0174] For occasions with a plurality of supporting legs 2, after step S22, the method further includes:

[0175] step 23: rotating the operation part of the wheeled crane for a certain angle, and mounting the next supporting leg until all the supporting legs are mounted.

[0176] It should be noted that prior to step S23, if the stability of the wheeled crane cannot be guaranteed, the positions and open/closed states of the auxiliary supports can be adjusted; and the stretching or swinging positions and the open/closed states of the supporting legs connected with the vehicle frame can also be adjusted, in order to enable the vehicle frame to consistently keep balance. That is, prior to step S23, the method can further include the following steps: detecting whether the wheeled crane with the supporting leg demounted can keep balance, if not, at least employing one of the following manners to enable the vehicle frame to keep balance: adjusting the positions and/or states of the auxiliary supports, or adjusting the positions and/or angles Of the supporting legs connected with the vehicle frame.

[0177] After all the supporting legs 2 are mounted, the following operations can also be carried out: the operation part 4 of the wheeled crane reset; all the supporting legs 2 on the wheeled crane and the original supporting legs are at working positions; and the auxiliary supports 3 are recycled. If the auxiliary supports 3 are detachably connected with the vehicle frame 1, the auxiliary supports 3 need to be accommodated at first, then the auxiliary supports 3 are moved away, and the operation part 4 is adjusted to carry out the lifting operation.

[0178] According to the self-mounting method for the supporting legs of the wheeled crane provided by the aforementioned technical solutions, the auxiliary supports 3 are combined with the operation part 4 of the crane to realize the self-mounting of the supporting legs 2 of the crane, and the auxiliary mechanical equipment is also reduced, thereby reducing the dependency on other cranes, and reducing the operation cost; and the operation preparation and position transfer time of the auxiliary crane are reduced, and thus the operation efficiency is improved. In addition, the occupied volume of the auxiliary supports 3 is small, and thus the necessary operation space is small during the self-mounting of the supporting legs 2.

[0179] In the description of the present invention, it should be understood that the terms “center”, “longitudinal”, “transverse”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside” and other terms indicating direction or position relationships are direction or position relationships based on what are shown in the figures, are merely used for describing the present invention and simplifying the description, rather than indicating or implying that the indicated devices or elements must have specific directions or be constructed and operated in specific directions, and thus cannot be understood as limitations to the protection scope of the present invention.

[0180] Finally, it should be noted that the above-mentioned embodiments are merely used for illustrating the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they could still make modifications to the specific implementations of the present invention or make equivalent substitutions to a part of technical features therein; and these modifications or substitutions shall all fall within the scope of the technical solutions of the present invention without departing from the spirit of the technical solutions of the present invention.